Definitely need to identify what poly-fi means to you.
For us-we're a V-so we don't fit the "every partner being equally involved with one another" as both maca and gg are straight.
But we do have the understanding that we require another person to be close friends with all of us at the very least.
If/when someone comes along who is potential for that (friendship with all of us and romantically involved with at least one of us) then we would require that the person be willing/able to spend time with all of us to build up those relationships with each of us before being allowed to become part of our family..
"Love As Thou Wilt"